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1
of positive clamp
#
jump-starting connection point in the direc‐
tion of the arrow.
Connect positive clamp
2
on your vehicle to
#
the positive pole of the donor battery using
the jump lead/charging cable. Always begin
with positive clamp
2
on your own vehicle
first.
During starting assistance: start the
#
engine of the donor vehicle and run at idle
speed.
Connect the negative pole of the donor bat‐
#
tery and earth point
by using the jump lead/charging cable. Begin
with the donor battery first.
During starting assistance: start the
#
engine of your own vehicle.
During the charging process: start the
#
charging process.
During starting assistance: let the engines
#
run for several minutes.
During starting assistance: before discon‐
#
necting the jump lead, switch on an electrical
2
on the
consumer in your own vehicle, e.g. the rear
window heater or lighting.
When the starting assistance/charging process
is complete, perform the following steps:
First, remove the jump lead/charging cable
#
from earth point
the donor battery, then from positive clamp
2
and the positive pole of the donor bat‐
#
3
of your own vehicle
Further information can be obtained at a quali‐
fied specialist workshop.
Replacing the 12 V battery
#
Mercedes-Benz recommends that you have the
12 V battery replaced at a qualified specialist
workshop, e.g. at a Mercedes-Benz Service
Centre.
Observe the following notes if you want to
replace the battery yourself:
R
3
and the negative pole of
Breakdown assistance 445
tery. Begin each time with the contacts on
your own vehicle first.
After removing the jump lead/charging
cable, close cover
1
of positive clamp 2.
Observe the notes on the 12 V battery
(
page 440).
/
Always replace a faulty battery with a battery
which meets the specific vehicle require‐
ments.
The vehicle is equipped with an AGM technol‐
ogy battery (Absorbent Glass Mat) or a lith‐
ium-ion battery. Full vehicle functionality is
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